Tutor and Freelance Writer. Science Teacher and Lover of Essays. Article last reviewed: 2020 | St. Rosemary Institution © 2010-2021 | Creative Commons 4.0

Sigmund Freud and Psychosexual Development

Main Ideas: Sigmund Freud believed that hidden forces are the cause of human behavior, rather than the obvious forces. Unconscious thoughts reveal themselves in something called the free association, such as dreams where you talk and think freely. He believed that personality consists of three major systems. The Structure of Personality: id- this starts at…

Lawrence Kohlberg: The Six Stages of Moral Development

Kohlberg’s six-stage theory was an extension of Jean Piaget’s cognitive development theory (how people learn and use knowledge is affected by both social and psychological factors). Kohlberg extended on Piaget’s theory, proposing that moral development is a continual process that occurs throughout the lifespan (the stage you are in life determines your level of moral…

Erik Erikson and the 8 Stages of Development

Erikson’s theories are the best-known theories of personality and development. Erikson believed that personality develops in a series of predetermined stages. His theories are psychosocial, and not psychosexual. Describes the impact of social experience across the whole lifespan. In each stage of development, Erikson described conflicts that act as turning points in life. In Erikson’s…

Protein Structures: Primary, Secondary, Tertiary, Quaternary

Proteins are the largest and most varied class of biological molecules, and they show the greatest variety of structures.  Many have intricate three-dimensional folding patterns that result in a compact form, but others do not fold up at all (“natively unstructured proteins”) and exist in random conformations. The function of proteins depends on their structure,…